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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: UniqueValidator.html 813 2013-12-23 16:52:26Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.validation;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.Collection;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.Map;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Set;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>import javax.validation.ConstraintValidatorContext;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span>/**<a name="line.16"></a>
<span class="sourceLineNo">017</span> * Validator for the {@link Unique @Unique} constraint.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * @see Unique<a name="line.19"></a>
<span class="sourceLineNo">020</span> */<a name="line.20"></a>
<span class="sourceLineNo">021</span>public class UniqueValidator extends AbstractValidator&lt;Unique, Object&gt; {<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>    private String domain;<a name="line.23"></a>
<span class="sourceLineNo">024</span>    private Uniquifier&lt;Object&gt; uniquifier;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>    @Override<a name="line.26"></a>
<span class="sourceLineNo">027</span>    @SuppressWarnings("unchecked")<a name="line.27"></a>
<span class="sourceLineNo">028</span>    public void initialize(Unique annotation) {<a name="line.28"></a>
<span class="sourceLineNo">029</span>        super.initialize(annotation);<a name="line.29"></a>
<span class="sourceLineNo">030</span>        this.domain = annotation.domain();<a name="line.30"></a>
<span class="sourceLineNo">031</span>        Class&lt;? extends Uniquifier&lt;?&gt;&gt; uniquifierClass = annotation.uniquifier();<a name="line.31"></a>
<span class="sourceLineNo">032</span>        try {<a name="line.32"></a>
<span class="sourceLineNo">033</span>            this.uniquifier = (Uniquifier&lt;Object&gt;)uniquifierClass.newInstance();<a name="line.33"></a>
<span class="sourceLineNo">034</span>        } catch (Exception e) {<a name="line.34"></a>
<span class="sourceLineNo">035</span>            throw new RuntimeException("can't create an instance of " + uniquifierClass + ": " + e.getMessage(), e);<a name="line.35"></a>
<span class="sourceLineNo">036</span>        }<a name="line.36"></a>
<span class="sourceLineNo">037</span>    }<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>    @Override<a name="line.39"></a>
<span class="sourceLineNo">040</span>    public boolean isValid(final Object propertyValue, ConstraintValidatorContext context) {<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>        // Ignore null values<a name="line.42"></a>
<span class="sourceLineNo">043</span>        if (propertyValue == null)<a name="line.43"></a>
<span class="sourceLineNo">044</span>            return true;<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>        // Recurse on collections and maps<a name="line.46"></a>
<span class="sourceLineNo">047</span>        if (propertyValue instanceof Collection)<a name="line.47"></a>
<span class="sourceLineNo">048</span>            return this.isCollectionValid((Collection&lt;?&gt;)propertyValue, context);<a name="line.48"></a>
<span class="sourceLineNo">049</span>        if (propertyValue instanceof Map)<a name="line.49"></a>
<span class="sourceLineNo">050</span>            return this.isCollectionValid(((Map&lt;?, ?&gt;)propertyValue).values(), context);<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>        // If we are only validating a sub-tree then skip this check<a name="line.52"></a>
<span class="sourceLineNo">053</span>        ValidationContext&lt;?&gt; validationContext;<a name="line.53"></a>
<span class="sourceLineNo">054</span>        try {<a name="line.54"></a>
<span class="sourceLineNo">055</span>            validationContext = ValidationContext.getCurrentContext();<a name="line.55"></a>
<span class="sourceLineNo">056</span>        } catch (ClassCastException e) {<a name="line.56"></a>
<span class="sourceLineNo">057</span>            return true;<a name="line.57"></a>
<span class="sourceLineNo">058</span>        }<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>        // Uniquify value<a name="line.60"></a>
<span class="sourceLineNo">061</span>        Object uniqueValue;<a name="line.61"></a>
<span class="sourceLineNo">062</span>        try {<a name="line.62"></a>
<span class="sourceLineNo">063</span>            uniqueValue = this.uniquifier.getUniqued(propertyValue);<a name="line.63"></a>
<span class="sourceLineNo">064</span>        } catch (ClassCastException e) {<a name="line.64"></a>
<span class="sourceLineNo">065</span>            throw new RuntimeException("uniquifier " + this.annotation.uniquifier()<a name="line.65"></a>
<span class="sourceLineNo">066</span>              + " does not support uniquifying values of type " + propertyValue.getClass());<a name="line.66"></a>
<span class="sourceLineNo">067</span>        }<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span>        // Ignore null values<a name="line.69"></a>
<span class="sourceLineNo">070</span>        if (uniqueValue == null)<a name="line.70"></a>
<span class="sourceLineNo">071</span>            return true;<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>        // Get the domain<a name="line.73"></a>
<span class="sourceLineNo">074</span>        final Set&lt;Object&gt; uniqueDomain = validationContext.getUniqueDomain(this.domain);<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>        // Verify value is unique XXX: this assumes isValid() is invoked only once per property<a name="line.76"></a>
<span class="sourceLineNo">077</span>        if (!uniqueDomain.add(uniqueValue)) {<a name="line.77"></a>
<span class="sourceLineNo">078</span>            this.setViolation(context, "non-unique value `" + uniqueValue + "' in uniqueness domain `" + this.domain + "'");<a name="line.78"></a>
<span class="sourceLineNo">079</span>            return false;<a name="line.79"></a>
<span class="sourceLineNo">080</span>        }<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>        // Done<a name="line.82"></a>
<span class="sourceLineNo">083</span>        return true;<a name="line.83"></a>
<span class="sourceLineNo">084</span>    }<a name="line.84"></a>
<span class="sourceLineNo">085</span>}<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>




























































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